Understanding FMB Sketch Definition The FMB Sketch (Field Measurement Book Sketch) in Tamil Nadu is an official land survey map prepared by the Survey and Land Records Department. It records the dimensions, boundaries, survey number, and subdivision number of each land parcel. This sketch is used as a legal proof of property measurement and ownership in Tamil Nadu. Key Takeaways The FMB Sketch is a detailed land survey document showing plot boundaries and measurements. Each land parcel is ... We would like to show you a description here but the site won’t allow us. Field Measurement Book (FMB) Sketch: A diagram of the land parcel in rural areas, useful for visualizing boundaries. TSLR Sketch (Urban): A map or sketch showing urban land parcel layouts. Verify Patta / Chitta: Allows users to verify the authenticity of a Patta or Chitta document issued online. View and download Field Measurement Sketch (FMB) of rural and urban land online for free. FMB sketch shows the boundaries and details of a land parcel measured by surveyors.